EDP Sciences
Free access
Volume 389, Number 1, July I 2002
Page(s) 68 - 83
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20020460

A&A 389, 68-83 (2002)
DOI: 10.1051/0004-6361:20020460

Analysis of the distribution of HII regions in external galaxies

IV. The new galaxy sample. Position and inclination angles
C. García-Gómez1, E. Athanassoula2 and C. Barberà1

1  D.E.I.M., Campus Sescelades, Avd. dels Països Catalans 26, 43007 Tarragona, Spain
2  Observatoire de Marseille, 2 place Le Verrier, 13248 Marseille Cedex 04, France

(Received 12 February 2002 / Accepted 19 March 2002)

We have compiled a new sample of galaxies with published catalogs of HII region coordinates. This sample, together with the former catalog of García-Gómez & Athanassoula (1991), will form the basis for subsequent studies of the spiral structure in disc galaxies. In this paper we address the problem of the deprojection of the galaxy images. For this purpose we use two deprojection methods based on the HII region distribution and compare the results with the values found in the literature using other deprojection methods. Taking into account the results of all the methods, we propose optimum values for the position and inclination angles of all the galaxies in our sample.

Key words: galaxies: structure -- galaxies: spiral -- galaxies: ISM -- ISM: HII regions

Offprint request: C. García-Gómez, cgarcia@etse.urv.es

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© ESO 2002